12563643 has 8 divisors (see below), whose sum is σ = 16784656. Its totient is φ = 8359200.

The previous prime is 12563591. The next prime is 12563669. The reversal of 12563643 is 34636521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12563643 - 2¹⁰ = 12562619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12563643.

It is not an unprimeable number, because it can be changed into a prime (12563143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2248 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (2098082).

Almost surely, 2^12563643 is an apocalyptic number.

12563643 is a deficient number, since it is larger than the sum of its proper divisors (4221013).

12563643 is an equidigital number, since it uses as much as digits as its factorization.

12563643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285.

The product of its digits is 12960, while the sum is 30.

The square root of 12563643 is about 3544.5229580298. The cubic root of 12563643 is about 232.4726479559.

The spelling of 12563643 in words is "twelve million, five hundred sixty-three thousand, six hundred forty-three".